Vanessa Hudgens is between a rock and a hard place after an alleged act of love has brought her under fire.

The 27-year-old actress and her 24-year-old boyfriend, Austin Butler, allegedly carved their names in a heart into a rock formation in Sedona, Arizona over Valentine's Day weekend, but the gesture might have broken a federal law.

My Valentine this year is @mayasideas At 8 years old she started her own business. She's given 3 Ted Talks, started a non-profit organization, and created multiple animated shows with a foundation in education. Now at 16 years old, she continues to change the world and make me feel like a massive slacker. 😝 Thank you @mayasideas for rocking our world. And thank you for coding this heart. I can barely work an iPhone. ☺️😉#codewithlove

Happy Valentine's Day to all the lonely hearts out there today ❤️

On my way ❤️

Happy Valentine's Day baby ...🌹😉😍😘

Breakfast in bed! #valentinesday #myvalentine

❤️❤️ @austinbutler #sedonadreams

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"Officials at the Coconino National Forest became aware of the incident [Monday] when the media alerted them of the situation," the officer tells ET. "There is no deadline for this investigation -- it takes as long as it takes. The maximum punishment for this is $5k and/or 6 months behind bars."